Electric-arc lamp



(No Model.) 2 Sheets8heet 1.

P. R. SAL'BERG. ELECTRIC ARC LAMP.

No. 567,691. Patented Sept. 15, 1896.

WITNESSES IN VENTOR (No Model.) I 2 Sheets-Sheet 2.

P.R.SALBERG.

ELECTRIC ARC LAMP.

No, 567,691. Patented Sept. 15, 1896.

WITNESSES:

I BY W ATTORNEY.

- I f INVENTOI? UNITED STATES PATENT OFFICE.

PHILIP R. SALE-ERG, OF ALLEGHENY, PENNSYLVANIA.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 567,691, datedSeptember 15, 1896.

Serial No. 575.186. (No model.)

To all whom, it may concern.-

Be it known that I, PHILIP R. SALBERG, a citizen of the United States,residing at Allegheny, in the county of Allegheny andState ofPennsylvania, have invented a new and useful Improvement in Regulatorsfor Arc- Lamps, of which the following is a specification.

The object of my invention is to provide a means for automaticadjustment of the carbons. This I accomplish by means of the' mechanismshown in the accompanying drawings, in which- Figure 1 is a side view,Fig. 2 is a plan, and Fig. 3 is a diagrammatic view, of the escape mentand its train of cog-wheels.

Similar letters refer to similar parts.

The following is a full description of my invention:

An axle a, is supported by two posts t. On axle a two drums b and c areloosely mounted, so that they will turn in either direction. These drumsb and a carry the cable or string from which the upper-carbon holder issuspended. The drum 1) is connected to a series of cog-wheels, to whichan escapement e is attached. One of these cog-wheels g is mounted uponthe same axis with and next to the drum 1), and connected to same by aspring 19 and a pawl r, whose office is to prevent the drum from movingforward when the escapement is arrested.

The drum 0 has a spring an inside, serving to wind up the string for theupper-carbon holder when the lamp is being trimmed. The drum cl servesas a guide for the string.

In connection with the escapement e is a lever 0, with an armature 7; ofsoft iron. The lever 0 is brought into action by means of a magnet isand a retracting-spring Z.

To the drum 0 is connected an arrange ment consisting of a lever 91., intwo parts, with a pawl r and an iron armature m attached. The magnet itattracts the armature on when any excess of current passes through thewindings la.

WVhen no current passes through the lamp, the spring Z causes the lever0 to release the escapement e, and will allow upper-carbon holder, byvirtue of its own weight, to slowly descend until the carbons aretogether.

If current is sent through the lamp, the magnet 71. will attract itsarmature m. The pawl 7' will then catch a cog on the drum 0 and turn itaround a little, thus winding up the string and separating the carbonstill the arc has reached its proper length. At the same time the magnetIt will attract its armature 6, thus arresting the escapement 6.

Then the carbons have burned off so much that the arc gets too long,this increases the electrical resistance and weakens the current, sothat the magnet h gradually relieves the armature m, which will belifted upward by the spring 5. At the same time the magnet gets weaker,so that the spring Z relieves the armature 2', thus making theescapement free, which allows the upper carbon to feed down till thecurrent has reached its normal strength. This process is repeated duringall the time that the lamp is in operation.

The length of the arc can be regulated by changing the power of thespiral spring Z. The main current serves to excite both magnets.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is

In a regulator for arc-lamps, the combination of the independently orloosely mounted drums, a series of cog-wheels, one of which has a springconnection with one of said drums, a lever mounted or pivoted upon theaxis of said drums and carrying a pawl, engaging one of said cog-wheels,said lever having a spring-suspended armature at its free end carryingan escapement or dog, a magnet for actuating said armature, a leveradapted to engage said escapement or dog carrying a spring-controlledarmature and a second magnet for actuating the latter armature incontrolling the lower carbon, the upper carbon being controlled from thesaid drums, substantially as set forth.

In testimony that I claim the foregoing I hereunto affix my signaturethis 2d day of November, A. D. 1894.

JOHN S. KENNEDY, I. A. OARLINs.

